You know I’m not on the hydaelyn is evil train, but...
We’ve all interacted with her so she fits the role of Chekov’s Gun. She puts an emphasis on hearing with her both her song and her “hear, feel, think” mantra (and one could put a sinister spin on “think” and “feel” when we’re talking about summoning up subconscious fears). And i think Answers did actually canonically echo throughout the overworld during 1.0’s end? (I wanna say its there in a coil cutscene. But can’t recall) And one could argue the sound in Amaurot’s time was sundering creation in a way, though not exactly how she does.
To completely tin foil hat this, could it be possible Hydaeyn was the embodiment of the sound/soundmaker? Maybe retooled by the summoner’s will, maybe not. Would depend onif the sound was intentionally sinister or if fears being summoned was an unintentional side effect cus fear just reacted more readily. Also its possible that zodiark was doing shenanigans inthe aethereal sea and the sound was hydaelyn’s response that went awry, or something he forced out of her, or any number of scenarios that allow her to still not be an evil liar who lies.
I doubt any of the above is a thing, but theories are fun.
